Listing all results (123)

The Hydrogen Peroxide/Potassium Iodide Clock Reaction

In this classic demonstration, from the Royal Society of Chemistry, a solution of hydrogen peroxide is mixed with one containing potassium iodide, starch, and sodium thiosulphate. The solution changes from colourless to dark blue, and halving the concentration will double the time.

The resource provides a...

Phenol/Methanal Polymerisation

In this classic demonstration, from the Royal Society of Chemistry, a pink thermosetting polymer is produced by adding sulphuric acid to an acidified solution of phenol in formalin. The product is a condensation polymer with many crosslinks.

The resource provides a list of apparatus and chemicals needed for...

The ‘Blue Bottle’ Experiment

In this classic demonstration, from the Royal Society of Chemistry, a colourless solution of potassium hydroxide, glucose, methylene blue, and ethanol is poured out into a sealed clear bottle. When shaken, air dissolves and the solution turns blue. Other indicators can be used to produce other colours.

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The ‘Old Nassau’ Clock Reaction

In this classic demonstration, from the Royal Society of Chemistry, solutions of iodate (V) ions, hydrogen sulphite ions, mercury (II) ions and starch are mixed together. The solution turns orange and then black. The oxidation states of the reactants, products and intermediates can be determined.

The...

Gas Chromatography

In this classic demonstration, from the Royal Society of Chemistry, volatile hydrocarbons are injected into a mock up of a chromatography column filled with washing powder. Natural gas is used as the carrier and once through, the column is burnt. As a sample of hydrocarbon emerges from the column, the flame will...

Liquid Nitrogen Demonstrations

This resource, from the Royal Society of Chemistry, describes five different demonstrations that can be done with liquid nitrogen.

The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips.

Curriculum links include: distillation of air, physical...

The Reaction Between Potassium Permanganate and Glycerol

In this classic demonstration, from the Royal Society of Chemistry, glycerol is poured on potassium permanganate, the reaction is strongly exothermic and a pink flame is given off.

The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips.

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A Giant Silver Mirror

In this classic demonstration, from the Royal Society of Chemistry, silver nitrate in the presence of ammonia is reduced by glucose to silver. The silver forms a mirrored surface on the inside of a large round bottomed flask.

The resource provides a list of apparatus and chemicals needed for the experiment,...

Determination of Relative Molecular Masses by Weighing Gases

In this classic demonstration, from the Royal Society of Chemistry, gases are weighed in gas syringes and the relative molecular mass is calculated using the ideal gas equation.

The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips.

Curriculum...

A Controlled Hydrogen Explosion

In this classic demonstration, from the Royal Society of Chemistry, a tin can is filled with a hydrogen, which is burnt at an exit hole. When the correct hydrogen air mix is reached inside the can it explodes blowing the lid off.

The resource provides a list of apparatus and chemicals needed for the...

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